CESSNA SKYMASTER REAR FIREWALL ENGINE ACCESS DOOR

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General Specs

Cessna Parts

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General Specs

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Detailed Description

We have designed similar access door for the earlier model Skymasters. This relatively simple solution is accomplished by making a ~14" by 19" cut out in the rear firewall. This does not cut any significant structure. Only the firewall and firewall stiffeners are cut.  Additional stiffeners are then installed at the sides of the opening, as well as a flange around the entire opening with anchor plates to reattach the cut out with 6-32 machine screws and a door seal to prevent engine liquids or gases from entering the cabin.

From 1963 to 1972 the Skymasters do not have a Rear Firewall Engine Accessory Access Door. This makes it very difficult and time consuming to service the Alternator and Magnetos.

On 1973-80 models Cessna installed an access door, which makes it much easier and less time consuming to service the Alternator and Magnetos.

We have designed similar access door for the earlier model Skymasters. This relatively simple solution is accomplished by making a ~14" by 19" cut out in the rear firewall. This does not cut any significant structure. Only the firewall and firewall stiffeners are cut.  Additional stiffeners are then installed at the sides of the opening, as well as a flange around the entire opening with anchor plates to reattach the cut out with 6-32 machine screws and a door seal to prevent engine liquids or gases from entering the cabin.  See the attached installation instructions and Drawing.

All of the items used are approved aircraft aluminum, anchor plates, machine screws, AN rivets and a door seal which meets Mil-1-46852 Types I and II.

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